Hammer



FIG. 1 is a perspective view of the present hammer;

FIG. 2 is a right side view of the present hammer;

FIG. 3 is a left side view of same;

FIG. 4 is a front view of same;

FIG. 5 is a rear view of the hammer of FIG. 1;

FIG. 6 is a top view of same; and,

FIG. 7 is a bottom view of the hammer of FIG. 1. 

CLAIM The ornamental design for a hammer, as shown and described. 